An uneasy calm settled over the south on Thursday morning after a day of heavy exchanges of fire.

At a funeral procession in Bint Jbeil on Wednesday, Hezbollah lawmaker Hassan Fadlallah told the ceremony that "no crime against civilians will pass without the enemy paying the price".

Hezbollah later Wednesday said it launched a barrage of 30 Katyusha rockets towards Kiryat Shmona in northern Israel "in response to the enemy's repeated crimes and its targeting of civilian houses in Bint Jbeil".

Since the cross-border hostilities began, more than 150 people have been killed on the Lebanese side, most of them Hezbollah combatants but also more than 20 civilians, three of them journalists, according to an AFP tally.

On the Israeli side, at least four civilians and nine soldiers have been killed, according to figures from the military.

After two Australian citizens were killed in an airstrike on their house in bint Jbeil, Australia's attorney general, Mark Dreyfus, urged Australians to leave Lebanon while commercial flights were still operating.